From: Kevin Wolf <kwolf@redhat.com>
Date: Wed, 8 Feb 2012 13:34:39 +0000 (+0100)
Subject: KVM: x86 emulator: VM86 segments must have DPL 3
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=66b0ab8fac1031ffc70eb77491048339f2717a54;p=deliverable%2Flinux.git

KVM: x86 emulator: VM86 segments must have DPL 3

Setting the segment DPL to 0 for at least the VM86 code segment makes
the VM entry fail on VMX.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index fa310a48591c..b19e9fffe582 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1244,6 +1244,8 @@ static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt,
 		seg_desc.type = 3;
 		seg_desc.p = 1;
 		seg_desc.s = 1;
+		if (ctxt->mode == X86EMUL_MODE_VM86)
+			seg_desc.dpl = 3;
 		goto load;
 	}